Electric Diverter Valve
The Electric Diverter Valve (EDV) is used on California fuel injected models and 2.8L and 3.1L W Body manual transaxle models. This EDV performs normal diverter valve operation and may provide air divert to the air cleaner for catalytic converter protection during wide open throttle and high temperature conditions.
The ECM de-energizes EDV solenoid (located in EDV), preventing manifold vacuum from entering the chamber during the above conditions. Spring tension against the lower diaphragm pushes the diaphragm up, diverting air to air cleaner. Air from the air pump is always shut off from the engine unless ECM grounds EDV circuit (solenoid energized). See Fig 1 .